{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["concept or principle", "material", "process parameter", "machine or equipment", "machanical property", "biomedical"], "input": "The microstructures of Al alloy 6061 subjected to very-high-power ultrasonic additive manufacturing were systematically examined to understand the underlying ultrasonic welding mechanism ."}
{"concept or principle": ["mechanism"], "material": ["microstructures", "Al alloy"], "process parameter": [], "machine or equipment": [], "machanical property": [], "biomedical": []}